EP 1940140 A4 20081231 - METHOD, APPARATUS AND SYSTEM FOR CROSSTALK TESTING OF MULTI-USER COMMUNICATION LINE
Title (en)
METHOD, APPARATUS AND SYSTEM FOR CROSSTALK TESTING OF MULTI-USER COMMUNICATION LINE
Title (de)
VERFAHREN, VORRICHTUNG UND SYSTEM ZUR ÜBERSPRECHPRÜFUNG EINER MEHRBENUTZER-KOMMUNIKATIONSLEITUNG
Title (fr)
PROCEDE, DISPOSITIF ET SYSTEME DE TEST DE DIAPHONIE DE LIGNE DE COMMUNICATION MULTI-UTILISATEUR
Publication
Application
Priority
- CN 2006002390 W 20060914
- CN 200510103308 A 20050916
Abstract (en)
[origin: EP1940140A1] A method, apparatus, and system for crosstalk test on multi-subscriber communication lines. The core of the invention is: loading a group of orthogonal spread spectrum codes to the transmitting side of each line, and testing the crosstalk of xSDL lines based on the received signal vector at the receiving side so that the source, amplitude, and phase of the crosstalk can be identified. With the invention, crosstalk test can be implemented in real time on xSDL lines without impacting the transmission performance of other lines. In addition, the test result shows how many lines have a significant impact on the line under test and reflects the severity of the impact, providing a powerful basis for dynamic spectrum management, and optimization of DSLAM system performance.
IPC 8 full level
H04M 11/06 (2006.01); H04B 3/32 (2006.01); H04J 13/00 (2011.01); H04J 13/18 (2011.01); H04L 25/00 (2006.01); H04M 3/00 (2006.01)
CPC (source: EP US)
H04B 3/487 (2015.01 - EP US); H04L 5/0007 (2013.01 - EP US); H04L 27/2613 (2013.01 - EP US); H04M 3/304 (2013.01 - EP US); H04M 3/34 (2013.01 - EP US); H04L 5/0016 (2013.01 - EP US)
Citation (search report)
- [X] US 6744813 B1 20040601 - KO KEN [US], et al
- [A] WO 0059125 A1 20001005 - ERICSSON TELEFON AB L M [SE]
- [A] US 6870901 B1 20050322 - GUDMUNDSSON THORKELL [US], et al
- [A] PAPANDREOU N ET AL: "Real-time FEXT crosstalk identification in ADSL systems", INTELLIGENT SIGNAL PROCESSING, 2003 IEEE INTERNATIONAL SYMPOSIUM ON 4-6 SEPT. 2003, PISCATAWAY, NJ, USA,IEEE, 4 September 2003 (2003-09-04), pages 61 - 66, XP010688401, ISBN: 978-0-7803-7864-3
- See references of WO 2007031025A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1940140 A1 20080702; EP 1940140 A4 20081231; EP 1940140 B1 20120815; CN 100442724 C 20081210; CN 1863099 A 20061115; ES 2390818 T3 20121116; JP 2009508415 A 20090226; JP 4718611 B2 20110706; RU 2008114835 A 20091027; RU 2385543 C2 20100327; US 2008188185 A1 20080807; US 7843800 B2 20101130; WO 2007031025 A1 20070322
DOCDB simple family (application)
EP 06790993 A 20060914; CN 200510103308 A 20050916; CN 2006002390 W 20060914; ES 06790993 T 20060914; JP 2008530304 A 20060914; RU 2008114835 A 20060914; US 4965508 A 20080317